Multistage turbine



Oct. 2 1923. 1,469,707

7 H. H. WAIT MULTISTAQE TURB INE Filed Feb. 14 1922 55 a5 31 a3 in INVENTOR ATTORNEY {HENRY iilwelr,

. several-stagesn v Patented fQct; 2;

of Indiana have invented a newgand useful Multistage .Turhinefof whichithe follow;

' ingisaspeciiieations. 1 1. i It is .the' object of my; invention to --pr oducie multistage; steami-turbine ,of the re:

1 entranttype, whereby provision is-qn'iadetor multipleaexpansio-n -of the steain -and the several stages ofi the turbinefare combined Withina total axiallength materiallyless than the sum f theaxiaij lengths 0f the In :;attaining this i object; stages are oi'fthe general type eshown in -my berf28, .1920. :E There may be any 'nuinberof 2 these stagesnand betweenadjacentstagesl provide a diaphraginqin the saine plane as the return 3 guides hetw een;, such stages for receiving the steam fromrtheturbine Wheel and directing git back against: such turbine whe'el for a secondi impacty and'l provide this diaphragni -with:openingsthrough it "provided withfinozzles for-directing the expanded steain-fifroi-n a higher-pressure wheel against the bladesof a-lowerpressure wWheel. The accompanying drawings .illustrateiny invention-.1 'gFig. l is a vert' ical central-section through ,tWo-stage turbine embodying my-'inventibn, the parts'outside f of-the turbine Wheel and nozzles being showmin elevation; andFig; 2 is a -fragmental 'sec,-, tional de ielopnient substantially 1 on" the line Q2-2 of Fig.1. v

,The turbine comprisesan outer casing 10 Within W'hicha plurality of turbine Wheels I ll and .12 are 'rotatahl-y'linountedl There maybe any number of theseturbine wheels, though for: simplicity -only ,two' are shown. These-turbine .Wheelsare fixed on-la rotatable;supporting shaft '13,;mountedin suitthesteanyin assingethrough the successive stages, the 3b ades. 15 fcn the jlow epfressure i'LbPmiati'onfiled i h- 7 3 3 i 3320515365311? able bearings 14. Thejj turbine wheels ll and;-.1 12 ,.areprovidedwithithe usualturbme thefsuccessive turbinegwheels through: which "the; ste'ani .passes 3 :1'61" ordinarily jot sueces; V v sively larger size because. of .r thei i educed' pressure; resultingjjfrom; the expansion. of

turbinef jvheel .512 thus, reiterates lafge wiihd 61 r the! ihmlf s ml turbine z t amii s 'iei iQi e 3i ab e m n a d eutbmatie w tre l s :to any ;desired;nun1ber.of nozzle/ stands 2 0;

with which the casing 10 isUp-rovided. .,These nozzle lstandsare hollow domes entering the e mrmes er pemaseem em ss mms:m 'mr wssw e emscease-as u min mize LIS,T*INDIA\1\TA,QQLIGORPORATIQN.

sideo-f the casing, to reeeive thisstean lgaild ordinarily the, steam mayihe shut oif fron at least someot these nozzle standssepaf rately for. ad]ust1 nent;for different loads, as

by. a hand alve-211 for the right-handen'oz zle. stand in Fig, ;2;.f Eaehnozzle. stand 20 ,"is 7 provided with: a nozzle 22- Which discharges the steam fro-n titsnozzle stand obliquely 'agalnst =.the.blades 15 oithe high-pressure turbine heel 11, as isv clearzfro-m Fig; 2.

T-henozzles 22: may be ofdifferent sizes, if desired;- for convenience in adjusting for the leach Ont-the. othersidegof =the;high,- pressure turbine "Wheel 11 are' arranged a plurality: of return guides 23, equal in number to thenozzles 22. These are ofthe general .shape shown. in Fig 2, being provided substantially opposite their associated-11oz;

zles with apl urality of ste amerece-iying passages 24, wh ch attheir;entrancejends-are properly directed to receiye the .stean dise charged 'froin the blades, of the high-pres r r sure wheel, and I are fcurved as shown 'to direct the steam through a-ll of such passages intoareturn manifold passage25 which disa l charges such ste z'am obliquelyagainst the blades 15. of the high-pressure turbine :Wheel 11 from: thelopposite side from that against for the return. guides 23 andwhich has:

tight joints With such-returniguides and with the casing lot a'sbyioyerlapping, flanges e '31. The steam-fwhich escapes from 1 the blades 15' of the high-pressure-turb-ine Wheel after passing through; such Wheel twice, :o'nce.

7 Q 1 which the nozzles QQdis hargesteam against in each direction, passes into; the space 32 in which the' high-p-ressure turb-ineeljwheel r rotates, and is confined on the .highrpressure sideof the -,diaphfa'gtnBO,

The, diaphragmBO. s provided a ple. rality ofipassagesfie through'it, for allowing Ifrom the casing to provide a passageway around such turbine wheel from one sidethereof to the other and the steam passes p through that.turbine--'wheel an even number 7 oitimes. 7. A' turbine,

9. A turbine, as claimed in claim "5, with the addition that one or more nozzles are mounted on said diaphragm atapertures therethrough to co-ioperate with' the other ceive steanr, said nozzles .pro ecting into close proximity to the turbine wheel with which they co-operate.

' the addition tha-tf one or more nozzlesare mounted on said diaphragmat apertures 10. A turbine,,as claimed in claiin'b, with therethrough to co-operate with the other turbine wheel from that from which the Steam return guides in the diaphragm -rereceive steam, said nozzles projecting into close proximity to the turbine wheel with which 7 they coeoperatef 11. A turbine, as c aimed in claim 7 with the addition that one or more nozzles are mounted on said diaphragm at apertures therethrough to co-operate with the other i turbine wheel from that from which'ithe steam return guides in the diaphragm re ceive steam, said nozzles projecting into close proximity to the turbine wheel with which they coroperate.

12. A turbine, as claimed in 01am 8, with theIaddit-ion that'one ormore nozzles are therethrough to co-operate with the other. turbine wheel from that from -which the steam return guides in the, diaphragm remounted on said diaphragm at apertures ceive steam, said nozzlesproiecting into close on the diaphragm overlap circumferentially the steamreturn guides.

theaddition that the steam return guides which project through. apertures in the diaphragm are 7 provided With flangeswhich overlap said apertures inthe diaphragm to formtight joints; v 3 V 7 I I 15.; A turbine,;as claimed in claimo, with it asclaimed in claim 5,1'with. the addition that the steam 'ret'u-rn guides I project beyond'th'e faces of thegdiaiphragmf intoclose proximity to both-turbine wheels.

I 8.:A turbine, asclaimed inclaim 6,l with -.the' addition that thesteam; return guides .projectbeyondthe faces ofthe. diaphragm intoclose proximity to both turbine wheels.

the addition that thesteam return guides whichproject throughapertures in the diaphragm are provided with flanges which form tight'joints; f 7 16. A turbine, as claimedin claim 14, with theaddition that the overlapping flanges are on that side of thediaphragm from. which the steam .return'guidesreceive steam.

17. A turbine, as claimed in claim 15,with [the addition that theoverlapping flanges are "on that side of the diaphragm from which turbine wheel "from that from. which the steam' return guides in the diaphragm rethe steam return guides receive steam,

'18.. A turbine, as claimed in claim 9, with .the addition that the steam, return guides sides of'the diaphragm. g

19. A turbine, as claimed in claim vl3, with the addition that the steam :return guides i it for discharging steam against the turbine wheel in the low-pressure stage, steam reside ot/the turbine wheel in the high-pres:

sure stage and discharging it back in the opposite direction againstthe same turbine overlap said apertures inthe diaphragm'to "and the nozzles are attached. to opposite V turn guides for receiving steam from one Wheel, said turbine wh'eel inj the high-p=reissure stage being spacedfrom thediaphragm and the casing. to provide a passageway around said turbine wheel from one side to the other, and the steam passages being an Jranged so that the steam passes through thatturbine wheel an even'number of times.-

21. A turbine, as claimed in claim 20, with v p the addition that the steam return guides proximity to the turbine wheel with which are'mo'un ted on said diaphragm.

. In witness whereof, I have hereunto set m hand at Indianapolisflndiana, this 13th .day of February, A. D. one thousand nine hundred-and twenty two.

; HENRY n. WAIT. 

